Flywheel Bolt size confusion

Leebastard · Feb 27, 2017

Hello folks, hopefully someone can help, I am stripping a 200 engine, trying to get the flywheel off, and it seems a 21mm or 13/16 socket is too small whilst a 22mm or 7/8 socket is slightly too big. I dont want to use a slightly too big socket with the impact gun because it'll make a mess of the head. Any suggestions?

fanks

Grem · Feb 27, 2017

22mm 6 sided not fit well enough? Did on my 300

Grezzer · Feb 27, 2017

As above a good quality 22mm 6 sided Socket and go steady.
I believe it's same as a 300

lynall · Feb 28, 2017

Yep I used the same 22mm 6 sided socket.
Good tip is use 6 siders for everything except where a bi-hex is needed ie calliper and disc bolts you get much less troubles, especially with air /power tools

Leebastard · Feb 28, 2017

Thanks for the responses chaps, i eventually got them off, my battery impact wouldn't touch them, airgun wouldn't touch them, wound up with the breaker and the crank locking tool. There's some tension in them eh! Well, having removed the bellhousing and flywheel, i have the engine up on the new stand and ready to rebuild.
This will be my first engine rebuild, so wish me luck. I think between the workshop manual, LZ and youtube i should get there.
Thanks again.
LB

neilly · Mar 1, 2017

Blimey, what is the torque meant to be?

Good news you got it off tho,

Cheers

lynall · Mar 1, 2017

I just rattled mine off with the battery gun, it is a good battery gun though.
As for torque I just rattled them up again using common sense otherwise they would shear/snap.

neilly · Mar 1, 2017

lynall said:
I just rattled mine off with the battery gun, it is a good battery gun though.
As for torque I just rattled them up again using common sense otherwise they would shear/snap.

From what I found torque is 147Nm, ( On a 300tdi tho, I do not have a book for the 200tdi, but having said that, not sure why they would be vastlty different) in which case an electric impact wrench should have whizzed them off nay problemo.

Maybe they had been done up Gorilla tight or used a threadlock on them.

Cheers

Edit, not 1467Nm but 147Nm , fat fingers......

lynall · Mar 1, 2017

1467nm

Just because a fastener has been torqued to a figure doesnt mean thats the torque you need to remove the same fastener especially if its been assembled dry, just about every quality air/cordless impact has more power in reverse than forward for this very reason.

neilly · Mar 1, 2017

lynall said:
1467nm

Just because a fastener has been torqued to a figure doesnt mean thats the torque you need to remove the same fastener especially if its been assembled dry, just about every quality air/cordless impact has more power in reverse than forward for this very reason.

Really...you do not say..............my point was even allowing for that an electric impact wrench should still have whizzed them off.

Cheers

lynall · Mar 1, 2017

All depends on what make/power your impact wrench is? not all are born equal.

Mine for example will remove truck wheel nuts, its not instant but it does it.

Flywheel Bolt size confusion

Leebastard

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Grem

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Grezzer

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lynall

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Leebastard

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neilly

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lynall

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neilly

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lynall

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neilly

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lynall

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